Heidelberg, Heidelberg, Baden Wurttemberg, Germany Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Heidelberg, Heidelberg, Baden Wurttemberg, Germany
AQI Trends: Highest and Lowest
Same Day Analysis (23rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 25 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 23rd Aug - 24th Aug 2025
Heidelberg, Heidelberg, Baden Wurttemberg, Germany
6 AM23rd Aug 2025
8 PM
5 AM24th Aug 2025
30AQI
22AQI
26AQI
22AQI
In the last 24 hours,
Heidelberg's AQI reached its highest point of 30 at 1 PM during the Day, while the lowest point, 22, was recorded at 2 AM during the Night between 23rd Aug and 24th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Heidelberg, Heidelberg, Baden Wurttemberg, Germany
19°C14/26°C
19°C15/24°C
18°C16/23°C
17°C14/22°C
17°C12/23°C
17°C14/22°C
18°C13/23°C
18°C15/21°C
17°C13/22°C
15°C12/19°C
17°C13/24°C
19°C14/24°C
17°C11/23°C
19°C13/27°C
22°C16/30°C
24°C18/31°C
22°C16/28°C
22°C15/29°C
24°C17/32°C
27°C19/35°C
28°C22/35°C
27°C21/34°C
23°C18/29°C
19°C15/25°C
19°C12/27°C
22°C15/30°C
23°C17/28°C
21°C17/25°C
17°C14/22°C
15°C11/19°C
--°C/°C
34AQI
34AQI
34AQI
33AQI
2025 Days Vs Air Quality
Heidelberg, Heidelberg, Baden Wurttemberg, Germany
73%
171
26%
61
1%
3
Total number of days with different AQI categories in last 236 days in 2025 (129 days remaining)
Under WHO’s Safe Air Quality Limits: 73%
Health Risk Level:
Low
In 2025, 73% of 236 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Heidelberg, Heidelberg, Baden Wurttemberg, Germany
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
75AQI
59AQI
58AQI
59AQI
60AQI
56AQI
54AQI
24AQI
23AQI
24AQI
49AQI
57AQI
47AQI
56AQI
80AQI
79AQI
55AQI
60AQI
79AQI
96AQI
95AQI
85AQI
66AQI
30AQI
27AQI
27AQI
27AQI
22AQI
23AQI
25AQI
26AQI
36AQI
42AQI
65AQI
78AQI
85AQI
81AQI
50AQI
76AQI
101AQI
130AQI
117AQI
72AQI
66AQI
90AQI
81AQI
63AQI
56AQI
61AQI
69AQI
79AQI
81AQI
62AQI
40AQI
32AQI
38AQI
27AQI
28AQI
29AQI
41AQI
33AQI
46AQI
55AQI
63AQI
64AQI
61AQI
69AQI
86AQI
77AQI
55AQI
84AQI
64AQI
57AQI
57AQI
57AQI
50AQI
26AQI
38AQI
55AQI
51AQI
36AQI
47AQI
32AQI
50AQI
79AQI
42AQI
46AQI
62AQI
44AQI
27AQI
23AQI
29AQI
45AQI
43AQI
40AQI
22AQI
17AQI
18AQI
22AQI
39AQI
57AQI
48AQI
37AQI
37AQI
35AQI
33AQI
29AQI
37AQI
31AQI
28AQI
19AQI
20AQI
26AQI
21AQI
30AQI
36AQI
25AQI
23AQI
29AQI
36AQI
41AQI
41AQI
43AQI
37AQI
22AQI
20AQI
21AQI
24AQI
22AQI
23AQI
25AQI
20AQI
25AQI
36AQI
37AQI
23AQI
28AQI
41AQI
35AQI
25AQI
29AQI
35AQI
26AQI
21AQI
24AQI
21AQI
24AQI
20AQI
21AQI
25AQI
29AQI
32AQI
34AQI
41AQI
33AQI
22AQI
18AQI
16AQI
18AQI
22AQI
50AQI
51AQI
47AQI
53AQI
55AQI
54AQI
35AQI
34AQI
41AQI
51AQI
40AQI
32AQI
32AQI
46AQI
34AQI
30AQI
35AQI
30AQI
23AQI
25AQI
27AQI
29AQI
41AQI
43AQI
37AQI
30AQI
25AQI
22AQI
20AQI
23AQI
26AQI
27AQI
25AQI
31AQI
33AQI
34AQI
31AQI
26AQI
29AQI
34AQI
30AQI
24AQI
18AQI
17AQI
21AQI
26AQI
29AQI
32AQI
27AQI
30AQI
26AQI
23AQI
22AQI
21AQI
21AQI
22AQI
24AQI
23AQI
23AQI
29AQI
37AQI
43AQI
48AQI
45AQI
57AQI
61AQI
64AQI
60AQI
48AQI
28AQI
27AQI
37AQI
45AQI
33AQI
25AQI
52AQI
66AQI
53AQI
31AQI
28AQI
35AQI
28AQI
37AQI
No. of days
202541AQI
Highest AQI recorded in
February66AQI
Lowest AQI recorded in
May28AQI
202436AQI
Highest AQI recorded in
January50AQI
Lowest AQI recorded in
April29AQI
202335AQI
Highest AQI recorded in
February46AQI
Lowest AQI recorded in
November24AQI
202239AQI
Highest AQI recorded in
March63AQI
Lowest AQI recorded in
September26AQI
202139AQI
Highest AQI recorded in
February50AQI
Lowest AQI recorded in
August29AQI
202038AQI
Highest AQI recorded in
November51AQI
Lowest AQI recorded in
October29AQI
Most & Least Polluted Years Over the Last 6 Years
Heidelberg's annual 2025 AQI (41) shows an average percentage change of 10.09% (worsened AQI) compared to previous years: 2020 (38), 2021 (39), 2022 (39), 2023 (35), 2024 (36).